I’m trying to get this QR reader to work with a UI Raw image but this line keeps throwing me an error:
data = webcamTexture.GetPixels32();
If I use the old on GUI method it works fine but I need it to work with a raw image on a canvas.
/*
* Copyright 2012 ZXing.Net authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System.Threading;
using UnityEngine;
using UnityEngine.UI;
using ZXing;
using ZXing.QrCode;
public class BarcodeCam : MonoBehaviour
{
// Readout Text
public Text ReadoutText;
// Texture for encoding test
public Texture2D encoded;
public WebCamTexture camTexture;
WebCamTexture webcamTexture;
public RawImage rawimage;
Color32[] data;
private Thread qrThread;
//private Color32[] c;
public int W, H;
private Rect screenRect;
private bool isQuit;
public string LastResult;
private bool shouldEncodeNow;
void OnGUI()
{
//GUI.DrawTexture(screenRect, camTexture, ScaleMode.ScaleToFit);
}
void OnEnable()
{
if (webcamTexture !=null)// camTexture != null)
{
//camTexture.Play();
webcamTexture.Play();
W = camTexture.width;
H = camTexture.height;
}
}
void OnDisable()
{
if (webcamTexture !=null )// camTexture != null)
{
//camTexture.Pause();
webcamTexture.Pause();
}
}
void OnDestroy()
{
qrThread.Abort();
//camTexture.Stop();
webcamTexture.Stop();
}
// It's better to stop the thread by itself rather than abort it.
void OnApplicationQuit()
{
isQuit = true;
}
void Start()
{
WebCamTexture webcamTexture = new WebCamTexture();
rawimage.texture = webcamTexture;
rawimage.material.mainTexture = webcamTexture;
webcamTexture.Play();
data = new Color32[webcamTexture.width * webcamTexture.height];
// ---------------------
encoded = new Texture2D(256, 256);
LastResult = "000";
shouldEncodeNow = true;
screenRect = new Rect(0, 0, W, H);
//camTexture = new WebCamTexture();
webcamTexture = new WebCamTexture();
//camTexture.requestedHeight = H;//Screen.height; // 480;
//camTexture.requestedWidth = W;//Screen.width; //640;
webcamTexture.requestedHeight = H;//Screen.height; // 480;
webcamTexture.requestedWidth = W;//Screen.width; //640;
OnEnable();
qrThread = new Thread(DecodeQR);
qrThread.Start();
}
void Update()
{
if (data == null)
{
//c = camTexture.GetPixels32();
data = webcamTexture.GetPixels32();
}
// encode the last found
var textForEncoding = LastResult;
// Display The Results
ReadoutText.text = LastResult;
if (shouldEncodeNow &&
textForEncoding != null)
{
var color32 = Encode(textForEncoding, encoded.width, encoded.height);
encoded.SetPixels32(color32);
encoded.Apply();
shouldEncodeNow = false;
}
}
void DecodeQR()
{
// create a reader with a custom luminance source
var barcodeReader = new BarcodeReader { AutoRotate = false, TryHarder = false };
while (true)
{
if (isQuit)
break;
try
{
// decode the current frame
var result = barcodeReader.Decode(data, W, H);
if (result != null)
{
// Display The Results
ReadoutText.text = LastResult;
LastResult = result.Text;
shouldEncodeNow = true;
print(result.Text);
}
// Sleep a little bit and set the signal to get the next frame
Thread.Sleep(200);
data = null;
}
catch
{
}
}
}
private static Color32[] Encode(string textForEncoding, int width, int height)
{
var writer = new BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new QrCodeEncodingOptions
{
Height = height,
Width = width
}
};
return writer.Write(textForEncoding);
}
}
